A giant submarine needs to travel great distances to reach destinations. The submarine can be modeled as

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A giant submarine needs to travel great distances to reach destinations. The submarine can be modeled as a cylinder with a radius of \(7 \mathrm{~m}\), a length of \(50 \mathrm{~m}\), and a weight of \(1.8 \times 10^{7}\) \(\mathrm{kg}\). Assuming the submarine is in water and is traveling at \(25 \mathrm{~km} / \mathrm{hr}\),

a. What is the average friction factor for the submarine?

b. What is the average shear stress on the surface?

c. What is the power requirement to maintain this speed?

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